JP2927271B2 - Golf wood club head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head having a hollow metal shell structure, and more particularly, to a golf club head having a ball body, a top shell, and bottom and peripheral side shells. It is formed of a three-part body with the lower shell part, and the structure of attaching the shaft to the head body by joining these three parts is devised.

[0002]

2. Description of the Related Art Conventionally, in a golf club head of this type (hereinafter referred to as a metal head), a head made of a metal outer shell formed by press molding of, for example, iron, stainless steel or titanium (Ti) alloy. 2. Description of the Related Art There is a known structure in which a main body is formed of a plurality of shells and these shells are joined to each other by welding.

When a shaft is attached to such a metal head, as shown in FIGS. 3 and 4, the shells a1, a2 and a3 constituting the head main body A are welded together with a shaft connecting member. The entirety of the pipe member B is externally joined to the outside of the head body A, or the pipe member B is internally joined to the inside of the head body A as shown in FIGS. At present, the welding is performed by inserting the mounting end side of the shaft C into the pipe member B and welding.

[0004]

However, in the above-mentioned conventional metal head, the entire pipe-shaped shaft connecting member B is welded to the head main body A as shown in FIGS. Head body A
The angle of attachment of the shaft connecting member B to the shaft can be easily corrected, but the strength of the joints is inferior, and the mounting direction of the shaft connecting member B at the time of welding is not only easily unstable, but also the shaft Since the connecting member B is externally attached to the outside of the head main body A, the position of the center of gravity of the head is easily shifted from the sweet spot to the heel side.

When the shaft connecting member B is internally joined to the head main body A as shown in FIGS. 5 and 6, the joint strength between them can be sufficiently maintained, and Although there is little movement of the center of gravity, each shell a
1, a2, a3 welding work to the shaft connecting member B,
In addition, it is difficult to perform polishing work by post-processing of the thickened portion formed in the welded portion of each of the shells a1, a2, and a3 after welding, or to correct the mounting angle of the shaft connecting member B to the head main body A. In addition, the length of the shaft connecting member B is regulated, the mounting position (insertion depth) of the shaft C on the shaft connecting member B is unstable, and the adhesive strength is small because the length of the shaft connecting member B is short. Is low.

Further, conventionally, each shell of the head body is
Even if the lower end of the shaft is welded and fixed to the bottom of the head main body, and the lower end of the shaft is welded and fixed to the shaft without using the shaft connecting member, the shaft of each shell is connected to the shaft. Not only is it difficult to perform the welding work, the polishing work by post-processing the thickened portion formed in each shell after welding, or the correction of the mounting angle of the shaft to the head body, but also the head body of the shaft itself However, there is a problem that it is difficult to finish the fixing portion on the base.

SUMMARY OF THE INVENTION It is an object of the present invention to enhance the joining operation of a head body and a shaft having a metal outer shell structure composed of a plurality of shell portions joined to each other, to make it easy to correct the attaching angle of the shaft and to increase the mounting strength. An object of the present invention is to provide a golf wood club head which can be improved.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention provides a head body having a metal outer shell structure, comprising a ball striking surface shell portion, an upper surface shell portion,
A golf wood club head formed by dividing a shaft connecting member provided with a shaft insertion hole into the head main body, which is formed into a three-piece body including a bottom surface portion including a bottom surface and a peripheral side surface shell portion. Projecting at an intermediate portion of the shaft connecting member
Part, and the protruding part is provided with a striking surface shell of each of the divided bodies.
The upper shell part and the lower shell part except for the part are joined by two pieces .

The invention according to claim 2 is the invention according to claim 1.
In the invention of the above, the shaft insertion hole of the shaft connecting member
Inside, a strut that regulates the insertion depth of the shaft mounting end
A stopper is provided, and this stopper is
Characterized by being located above the
You.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings shown in FIGS. 1 and 2. As shown in FIG. This is the club head body.

[0011] The head body 1 has a hollow shell structure consisting of shells 11, 12, 13 of a plurality of sheet metal material described later, the heel-side end 2 to be its shaft mounting base, the insertion holes An opening 3 is formed, and a shaft connecting member 4 is separately inserted into the insertion hole 3 and provided integrally by welding.

[0012] The shaft coupling member 4 is made of a rod-shaped body 5 of each of the shell portions 11, 12, 13 and weldable metal material constituting the head body 1, the bar-shaped body 5, the center axis O A small-diameter internal portion 5a that is reduced in a stepped manner in a lower end direction from a longitudinal intermediate portion along -O, and a large-diameter external portion 5b that is gradually reduced in a truncated cone shape in an upper end direction. A protruding portion 6 having a shape is formed, and a blind hole-shaped shaft insertion hole 7 into which a shaft 8 can be inserted and adhered is provided on the upper end surface of the large-diameter external portion 5b.

[0013] That is, the shaft connecting the small-diameter inside toothed portion 5a of the rod-like body 5 constituting the member 4 is inserted from the insertion hole 3 in the head body 1, also its thickness radially with portion 5b
The projection 6 is exposed to the outside of the head main body 1 and is formed integrally with the boundary between the small-diameter internal part 5a and the large-diameter external part 5b in a stepped state. The opening end 3a of the insertion hole 3 is joined and locked and welded.

As shown in FIG. 2, the above-mentioned head body 1 uses, as a metal sheet material constituting the outer shell, a metal sheet manufactured by, for example, rolling or the like. A shell portion of a three-piece body which is thinned by performing superplastic working, for example, a striking surface shell portion 11 which forms a striking surface surface which is formed by extending and extending an upper end edge 11a so as to form a front end portion of an upper surface of a head. And an upper shell 12 and a lower shell 13 forming an upper surface of the head.
The lower shell 13 is formed by integrating a bottom shell 14 on the bottom surface with a shell 15 on the toe-heel side and the rear side.
By welding and joining these shell parts 11, 12, and 13 together, the total weight of the head is up to 210 g or less.
Preferably, it is formed integrally so as to maintain a range of about 200 g.

[0015] Then, the heel-side end portion 12a of the upper surface shell 12 corresponding to the heel end 2 of such a head main body 1
The semicircular notch joining portion 1 serving as the insertion hole 3 of the shaft connecting member 4 is provided on the heel side end portion 13a of the lower shell portion 13 and the heel side end portion 13a.
6 and 17 are respectively formed, and these notched joint portions 1 are formed.
6 and 17 are respectively brought into contact with the protruding portions 6 formed on the shaft connecting member 4 and welded, and the large-diameter external portion 5b on the upper end side of the rod 5 is formed into a truncated cone in the upper end direction. The projecting part 6 formed by the form of gradually reducing the diameter, that is, the small-diameter internal part 5a is formed by the central axis OO of the rod-shaped body 5.
Since the diameter gradually increases in the radial direction perpendicular to the direction, that is, at least a part thereof extends toward the upper surface shell portion 12 forming the head main body 1, The surface of the shell on the heel side at the joint part is joined so that a step is not formed, and the surface is smoothly continuous and almost flat. Processing can be performed easily.

In this case, the small-diameter internal portion 5a of the rod 5 of the shaft connecting member 4 is inserted into the head body 1,
Further, by extending the front end portion toward the bottom shell portion 14 on the bottom surface side of the head main body 1 and making contact therewith, it is possible to weld and fix each other.

The shaft 8 is made of a conventional metal material or a material different from the material of the head body 1 such as CFRP, for example.
Is inserted into the shaft insertion hole 7 provided in the shaft connecting member 4 and adhered, so that the mounting end 8a of the shaft 8 as shown in FIG. In this state, the shaft 8 is mounted , and as shown in FIG.
The mounting end 8a of the shaft 8 is inserted in abutting state.
The inner bottom surface 7a of the shaft insertion hole 7 to be bonded is
Insertion hole 3 of heel side end 2 of head body 1 into section 6
Above the welding portion of the open end 3a of the
Have

[0018] Namely, the present invention is, by employing the configuration described above, the ball striking face shell portion 11, the upper surface shell 12
And a shaft connecting member 4 made of a metal material is welded to the insertion hole 3 formed in the heel side end 2 of the head main body 1 having a hollow metal outer shell structure composed of a three-piece body of the lower shell 13. And insert the ball into a protruding portion 6 formed at an intermediate portion of the shaft connecting member 4 in the longitudinal direction.
Since the heel-side ends 12a and 13a of the upper shell 12 and the lower shell 13 excluding the surface shell 11 are respectively joined by two pieces , the respective shells 12 and 13 and the shaft connecting member 4 are welded together. The joining position is clear and the mounting position is accurate, whereby the welding operation can be performed easily and the joining strength can be improved.

Further, the small-diameter internal portion 5a on the lower end side of the rod-shaped body 5 forming the shaft connecting member 4 is inserted and fixed inside the head main body 1, and the large-diameter externally attached portion 5b on the upper end side is formed outside the head main body 1. , The movement of the position of the center of gravity of the head as in the prior art is small, and the angle of attachment of the shaft 8 to the head main body 1 and the fixing of the shaft itself to the head main body 1 can be easily finished. Along with
Since the length of the shaft connecting member 4 is not limited, the bonding area between the shaft connecting member 4 and the shaft 8 is increased, and the bonding strength is increased.

Further, the protruding portion 6 formed to the intermediate portion to the shaft connecting member 4, a small diameter in the mounting portion 5a to be reduced diameter on the lower end side direction stepped-shaped rod-like body 5, gradually to the upper end side direction In particular, the surface of the upper shell 12 and the surface of the heel-side proximity shell 12a and the protrusion 6
Can be continuously and substantially flatly welded to each other, thereby improving a finished state by grinding or polishing of a build-up generated in a welded portion.

Furthermore, the inner bottom surface 7a of the shaft insertion hole 7 provided on the upper end surface of the shaft connecting member 4 and the stopper is inserted and bonded to the inner bottom surface 7a in a state that had abutting the attachment end 8a of the shaft 8 As a result, the insertion depth of the shaft 8 is restricted, and the joining state of the shaft 8 to the shaft connecting member 4 is stabilized.

Further , by adjusting the weight of the shaft connecting member 4, the weight of the entire head can be easily adjusted.

In the above-described embodiment, the protrusion 6 formed at the longitudinally intermediate portion of the rod 5 as the shaft connecting member 4 is provided on the entire circumference of the rod 5 around the central axis OO. Although the same protruding length is protruded over, at least in the direction toward at least the upper shell portion 12 side so as to open in a fan shape in one direction,
A flat planar form may be used in which the length of the protrusion corresponding to the upper shell 12 is increased and the length of the protrusion on the ball striking shell 11 or the lower shell 13 is reduced.

[0024]

As is apparent from the above description, the invention according to claim 1 of the present invention has a metal shell structure.
The head body is formed of a three-piece body consisting of a ball striking shell, an upper shell, and a lower shell composed of a bottom surface and a peripheral side shell.
Shaft connecting member with shaft insertion hole
In a golf wood club head obtained by joining
A protrusion is formed at an intermediate portion of the shaft connecting member,
Upper surface shell except for the striking surface shell portion of each of the divided bodies
Because the part and the lower surface shell are joined by two pieces , the joint position at the time of welding each shell and the shaft connecting member is clear,
Mounting position is accurate, thereby, it is possible to Nau easily line welding operation, it is possible to improve the bonding strength.

Further, a shaft insertion hole of the shaft connecting member is provided.
The inside of the shaft regulates the insertion depth of the mounting end of the shaft.
Provide a topper and use this stopper to form a protrusion.
Since it is located above the position, the joint state of the shaft to the shaft connecting member can be stabilized.

Furthermore, the weight adjustment of the shaft connecting member, the weight adjustment of the entire head can be easily performed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a principal part showing an embodiment of a golf wood club head using a shaft connecting member according to the present invention.

FIG. 2 is an exploded perspective view showing an assembled state of the head.

FIG. 3 is a cross-sectional view of an essential part showing an example of a conventional golf wood club head.

FIG. 4 is an exploded perspective view showing an assembled state of the head.

FIG. 5 is a sectional view showing a main part of another example of a conventional golf wood club head.

FIG. 6 is an exploded perspective view showing an assembled state of the head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Head main body, 2 ... Heel side end part, 3 ... Insertion hole, 4 ... Shaft connection member, 5 ... Rod-shaped body, 5a ... Small diameter internal part, 5b ..Large-diameter external part, 6 ... projection part, 7 ... shaft insertion hole, 7a ... inner bottom surface (stopper), 8 ... shaft, 8a ... mounting end part, 11 ...・ Spherical ball shell, 12 ・ ・ ・ Top shell, 12a ・ ・ ・ Heel side end, 13 ・ ・ ・ Bottom shell, 13a ・ ・ ・ Heel side end, 14 ・ ・ ・ Bottom shell, 15 ・..Surface side shell.

Claims (2)

(57) [Claims] 1. A formed with three portions of the ball-hitting surface shell portion of the head body comprising a metal shell structure, and the upper surface shell, a lower surface shell composed of a bottom and peripheral side shell, the shaft to the head body In a golf wood club head in which a shaft connecting member provided with an insertion hole is joined , a protruding portion is formed at an intermediate portion of the shaft connecting member, and the striking surface shell portion of each of the divided bodies is formed on the protruding portion. A wood club head for golf, wherein an upper shell portion and a lower shell portion except for two pieces are joined . Inside the shaft insertion holes of 2. A shaft coupling member, Rutotomoni provided a stopper for regulating an insertion depth of the attachment end of the shaft, the formation position of the protrusion of the stopper
2. The golf wood club head according to claim 1, wherein the golf club head is located above the golf club.